<!DOCTYPE html>
<html lang="zh_CN">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script type="text/javascript">
    /*
    * && ||
    *
    * !
    * */

    // 一假必假
    var op1 = false;
    var op2 = true;

    var status = op1 && op2;

    console.log(status);



</script>

</html>
